The Druids are the most celebrated wolf pack in North America; new pioneers in the wilderness, they were at the heart of a massive scientific experiment to restore an entire ecosystem that began to break down without its wolves. See the intimate record of their lives on Nature at 7 p.m, Sunday.

In Jane Austen’s gentle parody of gothic fiction, romance addict Catherine Morland is invited to a medieval country house that appeals to her most lurid fantasies, andforms a budding romance with the younger son on the estate at 8 p.m. Sunday on Masterpiece Classic.

A saga of ambition, wealth, family loyalty and personal tragedy, see how the Kennedy story is unlike any other on Kennedys: American Experience at 8 p.m. Monday.

Glaciers in Greenland and Antarctica are melting at an ever-faster rate. What explains this alarming acceleration? In this high-action scientific adventure, Nova investigates the mystery of the mighty ice sheets that will affect the fate of coastlines around the world on Tuesday at 7 p.m.

In the devastating aftermath of the economic meltdown, Frontline sifts the ashes for clues about why it happened and examines critical moments when it might have gone much differently at 8 p.m. on Tuesday.

Independent Lens tells the poignant and powerful story of animals left behind during Katrina, and of the struggles of hurricane victims to reunite with their beloved pets at 9 p.m. Tuesday.

Episode Two of Faces of America explores the many journeys to becoming American that defined the “Century of Immigration” (1820s –1924) and transformed the United States into a booming industrial power at 7 p.m. Wednesday.

As America embraces the automobile, a Nebraska housewife searches for peace and inspiration in park after park, while a honeymoon couple seeks fame and adventure in the Grand Canyon on National Parks: America’s Best Idea at 8 p.m. Wednesday.

Josh Homme from Queens of the Stone Age, Dave Grohl from the Foo Fighters and John Paul Jones from Led Zeppelin form “Them Crooked Vultures” and bust out high volume rock ‘n’ roll on Austin City Limits as at 10 p.m. Wednesday and 9 p.m. Friday.

Austin @ Issue: Energy for the Future at 7:30 p.m. Thursday features a discussion of Austin’s proposed long-range Resource and Climate Protection Plan with Austin Energy General Manager Roger Duncan and other experts and stakeholders.

Taped before a live audience at the Texas Lyceum Conference, experts on Great Debate Series: Cyber Security discuss issues of personal privacy and security of on-line information in the age of Social Networking at 8 p.m. Thursday.

With a backbone of Southern rock and country, passionate VanZant vocals, and trademark layered guitars, Lynyrd Skynyrd deliver renditions of their iconic classics on Soundstage that will blow you away at 9 p.m. Thursday.

In their debut Austin City Limits appearance, influential superstars R.E.M. take the stage in support of their latest acclaimed record, Accelerate at 7 p.m. Saturday.